B13E6

Code

LAND ROVER B — Body

Microphone 3

Brand: LAND ROVER

Type: B — Body

Views: UK: 16 EN: 22 RU: 14

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Page language: EN

Causes

Open or short in microphone 3 wiring or connector
Corroded, loose or damaged microphone connector
Failed microphone (element or internal electronics)
Water ingress or contamination in microphone or connector
Faulty ground or power/bias supply to the microphone
Fault in infotainment/voice control module or harness

Symptoms

Voice recognition not working or poor performance
Hands-free phone callers cannot hear vehicle occupant or audio is very low
Static, dropouts, or distorted voice input while using microphone 3
One or more voice-related features disabled with related warnings
DTC stored in infotainment/telephone module

What to check

Read and record all stored codes and freeze frame data with a diagnostic tool
Verify vehicle configuration and that microphone 3 is enabled in software
Visually inspect microphone 3, its mounting, and wiring for damage, moisture or corrosion
Check connector pins for deformation, corrosion or pushed-out terminals
Perform wiggle test on harness while monitoring live microphone signal or DTC status
Verify fuses and power supply circuits related to the audio/telephone module

Signal parameters

Microphone bias voltage (expected nominal value ~2–3 V depending on vehicle) measured between signal and ground
Quiescent DC level on microphone signal line (should be stable — not open or shorted to supply/ground)
AC signal amplitude during speech (tens to a few hundred mV peak-to-peak depending on mic type)
Microphone impedance (typical small electret mics: ~1–10 kΩ; confirm in vehicle service data)
Continuity between microphone connector and control module pins with low resistance (< a few ohms for shield/ground; signal line should show expected impedance)

Diagnostic algorithm

Connect automotive scan tool, read/record fault B13E6 and any related codes; note freeze frame data.
Clear codes and attempt to reproduce the fault using voice commands or a phone call to identify intermittent behavior.
Inspect microphone 3 location and connector for water, damage, debris or loose mounting. Repair as needed.
With ignition on, backprobing the microphone connector: measure microphone bias voltage and quiescent signal voltage; compare to expected values in service data.
If bias or signal is absent or out of range, inspect wiring harness for open/short to power or ground; perform continuity and resistance checks between mic and module.
Perform wiggle/strain tests on harness connectors while monitoring live data or listening for changes; repair any intermittent wiring or poor connector fit.
If wiring and bias are correct, temporarily swap or substitute a known-good microphone (if possible) or install a replacement microphone to confirm component failure.
If a replacement microphone doesn’t clear the fault, investigate the audio/telephone/voice module for internal faults; check for software updates or reprogramming bulletin.
After repairs, clear codes and verify system operation (voice recognition and hands-free calls) and that the DTC does not return.

Likely causes

Damaged or disconnected microphone 3 connector or wiring (most common)
Microphone element failure due to moisture or impact
Faulty bias supply (open/short) from the audio module
Intermittent connection caused by corrosion or pin damage
Module hardware or software fault (less common)

Fault status

⚠️ Status

Microphone 3 circuit fault detected — electrical or signal fault (open/short/intermittent) on microphone 3.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

Repair manuals

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Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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